If you're interested in the automatic deduction of points due to late ness, we've not been able to make the plugins available but we managed to implement automated late penalties using some (a lot of) jiggery pokery and combination of assignment submission & feedback plugins, event handlers and gradebook overrides.
It was *really* complicated, and had to take into account extensions, group work (and group extensions), automatically calculate incurred penalties against a predefined schedule (e.g. 10% per day up 7 days, capped at "pass" mark).
We also found issues with things like cut-off dates and students being allowed (in policy) to submit "forever" (incurring 100% penalty), which meant that these can't be used.